Adsorption Characteristics of Cu(II) and Pb(II) Ions onto Natural Manganese Ore from Aqueous Solution
The adsorption of heavy metal cations, i.e. Pb(II) and Cu(II), from aqueous solution by a natural manganese mineral (rhodochrosite) was investigated. The properties of the ore were studied using SEM, FT-IR, XRD and BET methods. The value of pH pzc was determined using an equilibrium technique to giv...
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| Format: | Article |
| Language: | English |
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SAGE Publishing
2008-10-01
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| Series: | Adsorption Science & Technology |
| Online Access: | https://doi.org/10.1260/026361708788059820 |
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| author | Taihong Shi Shiguo Jia Ying Chen Yinghong Wen Changming Du Zhuochao Wang Rongling Qiu |
| author_facet | Taihong Shi Shiguo Jia Ying Chen Yinghong Wen Changming Du Zhuochao Wang Rongling Qiu |
| author_sort | Taihong Shi |
| collection | DOAJ |
| description | The adsorption of heavy metal cations, i.e. Pb(II) and Cu(II), from aqueous solution by a natural manganese mineral (rhodochrosite) was investigated. The properties of the ore were studied using SEM, FT-IR, XRD and BET methods. The value of pH pzc was determined using an equilibrium technique to give a value of 7.8 ± 0.1 which was not affected by the presence of added electrolyte. Batch experiments were carried out to investigate the adsorption processes. Kinetic experiments indicated that the processes could be simulated by a pseudo-second-order model and the Elovich equation, suggesting that the process may be chemisorption in nature. The adsorption capacity increased with increasing initial concentration of metal cations. The resulting isotherms could be described by the Langmuir relationship, with the adsorbent showing a higher affinity towards Pb(II) ions than Cu(II) ions. Thermodynamic analysis indicated that the adsorption process was endothermic and possibly chemical in nature with positive values of ΔH 0 . Positive ΔS 0 values suggested that a dissociative process was involved. The small positive ΔG 0 values indicated that the adsorption processes required a small amount of energy. The adsorption processes were only slightly influenced by the concentration of added electrolyte but were strongly dependent on the pH value. It is proposed that the most possible mechanism for the adsorption processes involves inner-sphere complexation. |
| format | Article |
| id | doaj-art-e25cc4e19d6149cebb563a8b680d3e9c |
| institution | Kabale University |
| issn | 0263-6174 2048-4038 |
| language | English |
| publishDate | 2008-10-01 |
| publisher | SAGE Publishing |
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| series | Adsorption Science & Technology |
| spelling | doaj-art-e25cc4e19d6149cebb563a8b680d3e9c2025-01-03T00:10:40ZengSAGE PublishingAdsorption Science & Technology0263-61742048-40382008-10-012610.1260/026361708788059820Adsorption Characteristics of Cu(II) and Pb(II) Ions onto Natural Manganese Ore from Aqueous SolutionTaihong Shi0Shiguo Jia1Ying ChenYinghong Wen2Changming Du3Zhuochao Wang4Rongling Qiu5 School of Environmental Science and Engineering, Sun Yat-Sen University, Guangzhou 510275, P. R. China School of Environmental Science and Engineering, Sun Yat-Sen University, Guangzhou 510275, P. R. China School of Environmental Science and Engineering, Sun Yat-Sen University, Guangzhou 510275, P. R. China School of Environmental Science and Engineering, Sun Yat-Sen University, Guangzhou 510275, P. R. China Bureau of Environmental Protection, Huizhou 516001, P. R. China. (3) School of Environmental Science and Engineering, South China University of Technology, Guangzhou 510275, P. R. China School of Environmental Science and Engineering, Sun Yat-Sen University, Guangzhou 510275, P. R. ChinaThe adsorption of heavy metal cations, i.e. Pb(II) and Cu(II), from aqueous solution by a natural manganese mineral (rhodochrosite) was investigated. The properties of the ore were studied using SEM, FT-IR, XRD and BET methods. The value of pH pzc was determined using an equilibrium technique to give a value of 7.8 ± 0.1 which was not affected by the presence of added electrolyte. Batch experiments were carried out to investigate the adsorption processes. Kinetic experiments indicated that the processes could be simulated by a pseudo-second-order model and the Elovich equation, suggesting that the process may be chemisorption in nature. The adsorption capacity increased with increasing initial concentration of metal cations. The resulting isotherms could be described by the Langmuir relationship, with the adsorbent showing a higher affinity towards Pb(II) ions than Cu(II) ions. Thermodynamic analysis indicated that the adsorption process was endothermic and possibly chemical in nature with positive values of ΔH 0 . Positive ΔS 0 values suggested that a dissociative process was involved. The small positive ΔG 0 values indicated that the adsorption processes required a small amount of energy. The adsorption processes were only slightly influenced by the concentration of added electrolyte but were strongly dependent on the pH value. It is proposed that the most possible mechanism for the adsorption processes involves inner-sphere complexation.https://doi.org/10.1260/026361708788059820 |
| spellingShingle | Taihong Shi Shiguo Jia Ying Chen Yinghong Wen Changming Du Zhuochao Wang Rongling Qiu Adsorption Characteristics of Cu(II) and Pb(II) Ions onto Natural Manganese Ore from Aqueous Solution Adsorption Science & Technology |
| title | Adsorption Characteristics of Cu(II) and Pb(II) Ions onto Natural Manganese Ore from Aqueous Solution |
| title_full | Adsorption Characteristics of Cu(II) and Pb(II) Ions onto Natural Manganese Ore from Aqueous Solution |
| title_fullStr | Adsorption Characteristics of Cu(II) and Pb(II) Ions onto Natural Manganese Ore from Aqueous Solution |
| title_full_unstemmed | Adsorption Characteristics of Cu(II) and Pb(II) Ions onto Natural Manganese Ore from Aqueous Solution |
| title_short | Adsorption Characteristics of Cu(II) and Pb(II) Ions onto Natural Manganese Ore from Aqueous Solution |
| title_sort | adsorption characteristics of cu ii and pb ii ions onto natural manganese ore from aqueous solution |
| url | https://doi.org/10.1260/026361708788059820 |
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